package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.WebSocket.WebSocketServer;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;

    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;

    @Override
    @Transactional
    public OrderSubmitVO submit(OrdersSubmitDTO orderSubmitDTO) {

        //处理业务异常：1.购物车为空 2.地址为空
        AddressBook addressBook = addressBookMapper.getById(orderSubmitDTO.getAddressBookId());
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查收货地址是否超出配送范围
        checkOutOfRange(addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list = shoppingCartMapper.selectByUserIdAndGoodsId(shoppingCart);
        if (list == null || list.size() == 0) {
            throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //向订单表中插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(orderSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(System.currentTimeMillis() + "");
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        String address = addressBook.getProvinceName() + addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail();
        orders.setAddress(address);

        orderMapper.insert(orders);


        List<OrderDetail> orderDetails = new ArrayList<>();
        //向订单明细表中插入数据
        for(ShoppingCart cart : list){
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetails);

        //清空购物车
        shoppingCartMapper.deleteByUserId(userId);
        //封装返回结果
        OrderSubmitVO build = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();


        return  build;
    }

    @Override
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
        //假支付
        JSONObject jsonObject = new JSONObject();

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    @Override
    public void paySuccess(String outTradeNo) {
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        // 推送消息
        Map map = new HashMap();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content",outTradeNo);

        String jsonString = JSON.toJSONString(map);

        webSocketServer.sendToAllClient(jsonString);


    }

    @Override
    public PageResult historyOrders(int page, int size, Integer status) {


        PageHelper.startPage(page, size);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        Page<Orders> orders = orderMapper.page(ordersPageQueryDTO);


        List<OrderVO> orderVOS = getOrderVOS(orders);



        return new PageResult(orders.getTotal(), orderVOS);
    }

    @Override
    public OrderVO orderDetail(Long id) {

        Orders orders = orderMapper.getById(id);
        List<OrderDetail> orderDetails = orderDetailMapper.selectByOrderId(id);

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetails);

        return orderVO;

    }

    @Override
    public void cancel(Long id) {

        //先查询订单
        Orders orders = orderMapper.getById(id);
        if(orders == null){
            throw new OrderBusinessException("订单不存在");
        }
        //如果status>2,则不能取消订单
        if(orders.getStatus() > 2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders1 = new Orders();
        orders1.setId(orders.getId());

        //其他状态可以取消订单，并退款
        // 订单处于待接单状态下取消，需要进行退款
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            System.out.println("调用微信支付退款接口");

            //支付状态修改为 退款
            orders1.setPayStatus(Orders.REFUND);
        }

        //更新订单状态
        orders1.setStatus(Orders.CANCELLED);
        orders1.setCancelReason("用户取消订单");
        orders1.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders1);
    }

    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {

        //查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //已付款订单，需要退款
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
            //用户已支付，需要退款
            System.out.println("调用微信支付退款接口");
        }

        Orders orders = new Orders();

        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);

    }

    @Override
    public void repetition(Long id) {

        //查询订单明细
        List<OrderDetail> orderDetails = orderDetailMapper.selectByOrderId(id);

        //将商品重新加入购物车
        Long userId = BaseContext.getCurrentId();

        //将OrderDetail对象转换为ShoppingCart对象
        List<ShoppingCart> shoppingCarts = new ArrayList<>();
        for(OrderDetail orderDetail : orderDetails){

            ShoppingCart shoppingCart = new ShoppingCart();
            //属性复制但忽略id
            BeanUtils.copyProperties(orderDetail, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCarts.add(shoppingCart);
        }

        //批量插入购物车
        shoppingCartMapper.insertBatch(shoppingCarts);

    }

    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        /*
        * beginTime	否		beginTime
            endTime	否		endTime
            number	否		number
            page	是		page
            pageSize	是		pageSize
            phone	否		phone
            status	否		status
        *
        * */

        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> orders = orderMapper.page(ordersPageQueryDTO);

        // 封装返回结果
        List<OrderVO> orderVOS = getOrderVOS(orders);



        return new PageResult(orders.getTotal(), orderVOS);
    }

    @Override
    public OrderStatisticsVO statistics() {

        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countByStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countByStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countByStatus(Orders.DELIVERY_IN_PROGRESS);

        // 封装返回结果
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;

    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {

        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {

        //修改订单状态为拒单
        //查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        // 订单只有存在且状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
            System.out.println("调用微信支付退款接口");
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);

    }

    @Override
    public void delivery(Long id) {

        //只有订单状态为3（待派送）才可以派送
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();

        orderMapper.update(orders);

    }

    @Override
    public void complete(Long id) {

        //只有订单状态为4（派送中）才可以完成
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = Orders.builder()
                .id(id)
                .status(Orders.COMPLETED)
                .deliveryTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

    }

    @Override
    public void reminder(Long id) {

        //查询订单
        Orders ordersDB = orderMapper.getById(id);

        if(ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map = new HashMap();
        map.put("type",2);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号" + ordersDB.getNumber());

        String jsonString = JSON.toJSONString(map);

        webSocketServer.sendToAllClient(jsonString);

    }


    private List<OrderVO> getOrderVOS(Page<Orders> orders) {
        List<OrderVO> orderVOS = new ArrayList<>();
        // 遍历查询结果
        if (orders != null && orders.size() > 0) {
            // 遍历订单
            for (Orders order : orders) {
                // 订单id
                Long orderId = order.getId();
                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.selectByOrderId(order.getId());

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(order, orderVO);
                String orderDishes = getOrderDishesStr(order);
                orderVO.setOrderDishes(orderDishes);

                orderVO.setOrderDetailList(orderDetails);

                orderVOS.add(orderVO);
            }
        }
        return orderVOS;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.selectByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }


    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
}
